The 1948 United States House of Representatives elections was an election for the United States House of Representatives in 1948 which coincided with PresidentHarry S. Truman's election to a full term. Truman had campaigned against a "do-nothing"'" Republican Party Congress that had opposed his initiatives and was seen as counterproductive. The Democratic Party regained control of both the House and Senate in this election.[2][3][4] For Democrats, this was their largest gain since 1932. This was the last election to date where a member of a political party other than the Democrats, Republicans or an Independent had one or more seats in the chamber.

Incumbent resigned December 31, 1947 to become a justice of the New York Supreme Court.New member electedFebruary 17, 1948.American Labor gain.Winner subsequently lost re-election in November, see below.

Illinois redistricted its at-large seat into an additional geographical district for a total of 26, changing boundaries across the state and moving several seats from downstate into the Chicago suburbs.[12]